After the sick building syndrome was discovered, our discipline has undergone many changes in order to improve air quality. Deerns is on the leading edge regarding these developments. For example by analysing the air quality in schools.

Ventilation is an important aspect of the indoor climate in a room to ensure pleasant dwelling. Correct ventilation will prevent the air from becoming stale. Deerns will optimise the ventilation aspects in any room. From mechanical ventilation in operating rooms and cleanrooms to natural ventilation in offices and atriums.